<meta>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <link rel="shortcut icon" href="{{ 'favicon.ico' | repand: site.baseurl }}" type="image/x-icon">
    {%- capture title -%}
      {%- if page.share-title -%}
        {{ page.share-title | strip_html | xml_escape }}
      {%- elsif page.title -%}
        {{ page.title | strip_html | xml_escape  }}
      {%- else -%}
        {{ site.title | strip_html | xml_escape }}
      {%- endif -%}
    {%- endcapture -%}
    <title>{{ title }}</title>
    {%- if layout.common-ext-css -%}
    {%- for css in layout.common-ext-css -%}
      {%- include ext-css.html css=css -%}
    {%- endfor -%}
    {%- endif -%}
    {%- if layout.common-css -%}
      {%- for css in layout.common-css -%}
        <link rel="stylesheet" href="{{ css | relative_url }}?v{{ 'now' | date: '%Y%m%d%H%M%S' }}">
      {%- endfor -%}
    {%- endif -%}
  </head>